Photovoltaic panel



FIG. 1 is a front view of a photovoltaic panel showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a first side view thereof;

FIG. 5 is a second side view thereof; and,

FIG. 6 is a perspective view thereof. 

The ornamental design for a photovoltaic panel, as substantially shown and described. 